The invention relates to a concrete construction device, which includes an outer
pipe, an inner rammer, a reinforcement cage, a soil expander, a reinforcement expander and an expanded
steel ball, and also includes a concrete construction method, the steps of which are: 1), pre-excavation piles 2), the outer
pipe sinks into the
pile hole; 3), the inner rammer free falls to expand the space at the bottom of the outer
pipe; 4), put the expander into the outer pipe to expand the soil; 5), take out the expander, pass The internal rammer falls freely to expand the bottom space; 6), repeat steps 4 and 5 to expand the head space; 7), take out the soil expander and internal rammer, and put them into the reinforcement cage; 8), put the expander Enter the outer pipe to expand the reinforcement; 9), pour a layer of
cement in the expansion head space; 10), put the expanded
steel ball into the expansion head space, and pull out the binding
rope; 11), adjust the expanded expanded
steel ball with the adjustment lever; 12) 1. Pour concrete into the outer pipe to the top of the
pile; 13) Lift the outer pipe and vibrate the dense concrete. The invention has the effect that the constructed
pile has stronger pull-out resistance.